package com.mayblackcat.amoy.product.controller;


import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.common.utils.BinaryUtil;
import com.aliyun.oss.model.MatchMode;
import com.aliyun.oss.model.PolicyConditions;
import com.mayblackcat.common.utils.R;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.json.JSONObject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * @ClassName : ossController
 * @Description : 服务端签名直传到阿里云服务器中
 *
 * 注意阿里云必须开启文件管理授权匿名可读否则会出现跨域
 *
 * @Author : MayBlackCat
 * @Date: 2021-08-26 22:02
 */
@RestController
@RequestMapping("product/oss")
public class OssController {
    /**
     * 创建OSSClient实例。
     */
    @Autowired
    private OSS ossClient;

    @Value("${spring.cloud.alicloud.oss.endpoint}")
    private String endpoint;

    @Value("${spring.cloud.alicloud.oss.bucket}")
    private String bucket;

    @Value("${spring.cloud.alicloud.access-key}")
    private String accessId;


    @RequestMapping("/policy")
    public R policy(){

        // host的格式为 bucketname.endpoint
        String host = "https://" + bucket + "." + endpoint;
        // 生成对应的文件日期存储每天文件对象。
        String format = new SimpleDateFormat("yyyy-MM-dd").format(new Date());
        // 用户上传文件时指定的前缀。
        String dir = format+"/";

        Map<String, String> respMap = null;
        try {
            long expireTime = 30;
            long expireEndTime = System.currentTimeMillis() + expireTime * 1000;
            Date expiration = new Date(expireEndTime);
            // PostObject请求最大可支持的文件大小为5 GB，即CONTENT_LENGTH_RANGE为5*1024*1024*1024。
            PolicyConditions policyConds = new PolicyConditions();
            policyConds.addConditionItem(PolicyConditions.COND_CONTENT_LENGTH_RANGE, 0, 1048576000);
            policyConds.addConditionItem(MatchMode.StartWith, PolicyConditions.COND_KEY, dir);

            String postPolicy = ossClient.generatePostPolicy(expiration, policyConds);
            byte[] binaryData = postPolicy.getBytes("utf-8");
            String encodedPolicy = BinaryUtil.toBase64String(binaryData);
            String postSignature = ossClient.calculatePostSignature(postPolicy);

            respMap = new HashMap<>();
            respMap.put("accessid", accessId);
            respMap.put("policy", encodedPolicy);
            respMap.put("signature", postSignature);
            respMap.put("dir", dir);
            respMap.put("host", host);
            respMap.put("expire", String.valueOf(expireEndTime / 1000));
            // respMap.put("expire", formatISO8601Date(expiration));


        } catch (Exception e) {
            // Assert.fail(e.getMessage());
            System.out.println(e.getMessage());
        } finally {
            ossClient.shutdown();
        }
        return R.ok().put("data",respMap);
    }
}
